diff --git a/manifests/easyiot/zb-gw04-1v1_openthread_rcp.yaml b/manifests/easyiot/zb-gw04-1v1_openthread_rcp.yaml
index e16a4c31..ce54e0ee 100644
--- a/manifests/easyiot/zb-gw04-1v1_openthread_rcp.yaml
+++ b/manifests/easyiot/zb-gw04-1v1_openthread_rcp.yaml
@@ -1,7 +1,7 @@
 name: ZB-GW04-1v1 OpenThread RCP
 device: EFR32MG21A020F768IM32
 base_project: src/openthread_rcp
-filename: "{manifest_name}_{ot_rcp_version.split('/')[-1]}_gsdk_{sdk_version}_{baudrate}"
+filename: "{manifest_name}_{ot_rcp_version.split('/')[-1]}_gsdk_{sdk_version}_{variant}_{baudrate}"
 sdk: "simplicity_sdk:2024.6.2"
 toolchain: "12.2.1.20221205"
 
@@ -9,6 +9,7 @@ gbl:
   fw_type: openthread_rcp
   ot_rcp_version: dynamic
   baudrate: 230400
+  variant: no_flow
 
 configuration:
   SL_DEVICE_INIT_HFXO_CTUNE: 128
diff --git a/manifests/easyiot/zb-gw04-1v1_zigbee_ncp.yaml b/manifests/easyiot/zb-gw04-1v1_zigbee_ncp.yaml
index d7cbe977..33c42a4f 100644
--- a/manifests/easyiot/zb-gw04-1v1_zigbee_ncp.yaml
+++ b/manifests/easyiot/zb-gw04-1v1_zigbee_ncp.yaml
@@ -1,7 +1,7 @@
 name: ZB-GW04-1v1 Zigbee
 device: EFR32MG21A020F768IM32
 base_project: src/zigbee_ncp
-filename: "{manifest_name}_{ezsp_version}_{baudrate}"
+filename: "{manifest_name}_{ezsp_version}_{variant}_{baudrate}"
 sdk: "simplicity_sdk:2024.6.2"
 toolchain: "12.2.1.20221205"
 
@@ -9,6 +9,7 @@ gbl:
   fw_type: zigbee_ncp
   ezsp_version: dynamic
   baudrate: 115200
+  variant: sw_flow
 
 configuration:
   SL_ZIGBEE_CHILD_TABLE_SIZE: 32
diff --git a/manifests/smlight/slzb06m_opentread_rcp.yaml b/manifests/smlight/slzb06m_opentread_rcp.yaml
index 25171715..6d8cd037 100644
--- a/manifests/smlight/slzb06m_opentread_rcp.yaml
+++ b/manifests/smlight/slzb06m_opentread_rcp.yaml
@@ -1,7 +1,7 @@
 name: SLZB-06M OpenThread RCP
 device: EFR32MG21A020F768IM32
 base_project: src/openthread_rcp
-filename: "{manifest_name}_{ot_rcp_version.split('/')[-1]}_gsdk_{sdk_version}_{baudrate}"
+filename: "{manifest_name}_{ot_rcp_version.split('/')[-1]}_gsdk_{sdk_version}_{variant}_{baudrate}"
 sdk: "simplicity_sdk:2024.6.2"
 toolchain: "12.2.1.20221205"
 
@@ -9,6 +9,7 @@ gbl:
   fw_type: openthread_rcp
   ot_rcp_version: dynamic
   baudrate: 460800
+  variant: no_flow
 
 configuration:
   SL_DEVICE_INIT_HFXO_CTUNE: 80
diff --git a/manifests/smlight/slzb06m_zigbee_ncp.yaml b/manifests/smlight/slzb06m_zigbee_ncp.yaml
index 26af3fcb..2b3d765f 100644
--- a/manifests/smlight/slzb06m_zigbee_ncp.yaml
+++ b/manifests/smlight/slzb06m_zigbee_ncp.yaml
@@ -1,7 +1,7 @@
 name: SLZB-06M Zigbee
 device: EFR32MG21A020F768IM32
 base_project: src/zigbee_ncp
-filename: "{manifest_name}_{ezsp_version}_{baudrate}"
+filename: "{manifest_name}_{ezsp_version}_{variant}_{baudrate}"
 sdk: "simplicity_sdk:2024.6.2"
 toolchain: "12.2.1.20221205"
 
@@ -9,6 +9,7 @@ gbl:
   fw_type: zigbee_ncp
   ezsp_version: dynamic
   baudrate: 115200
+  variant: sw_flow
 
 configuration:
   SL_ZIGBEE_CHILD_TABLE_SIZE: 32
diff --git a/manifests/sonoff/zbdonglee_openthread_rcp.yaml b/manifests/sonoff/zbdonglee_openthread_rcp.yaml
index 7d29cd45..ecfff41b 100644
--- a/manifests/sonoff/zbdonglee_openthread_rcp.yaml
+++ b/manifests/sonoff/zbdonglee_openthread_rcp.yaml
@@ -1,7 +1,7 @@
 name: ZBDongle-E OpenThread RCP
 device: EFR32MG21A020F768IM32
 base_project: src/openthread_rcp
-filename: "{manifest_name}_{ot_rcp_version.split('/')[-1]}_gsdk_{sdk_version}_{baudrate}"
+filename: "{manifest_name}_{ot_rcp_version.split('/')[-1]}_gsdk_{sdk_version}_{variant}_{baudrate}"
 sdk: "simplicity_sdk:2024.6.2"
 toolchain: "12.2.1.20221205"
 
@@ -9,6 +9,7 @@ gbl:
   fw_type: openthread_rcp
   ot_rcp_version: dynamic
   baudrate: 460800
+  variant: no_flow
 
 configuration:
   SL_DEVICE_INIT_HFXO_CTUNE: 128
diff --git a/manifests/sonoff/zbdonglee_zigbee_ncp.yaml b/manifests/sonoff/zbdonglee_zigbee_ncp.yaml
index 1c5d12bd..7024a37c 100644
--- a/manifests/sonoff/zbdonglee_zigbee_ncp.yaml
+++ b/manifests/sonoff/zbdonglee_zigbee_ncp.yaml
@@ -1,7 +1,7 @@
 name: ZBDongle-E Zigbee
 device: EFR32MG21A020F768IM32
 base_project: src/zigbee_ncp
-filename: "{manifest_name}_{ezsp_version}_{baudrate}"
+filename: "{manifest_name}_{ezsp_version}_{variant}_{baudrate}"
 sdk: "simplicity_sdk:2024.6.2"
 toolchain: "12.2.1.20221205"
 
@@ -9,6 +9,7 @@ gbl:
   fw_type: zigbee_ncp
   ezsp_version: dynamic
   baudrate: 115200
+  variant: sw_flow
 
 configuration:
   SL_ZIGBEE_CHILD_TABLE_SIZE: 32
diff --git a/manifests/sparkfun/mgm240p_openthread_rcp.yaml b/manifests/sparkfun/mgm240p_openthread_rcp.yaml
index 174cbe12..4b1a8269 100644
--- a/manifests/sparkfun/mgm240p_openthread_rcp.yaml
+++ b/manifests/sparkfun/mgm240p_openthread_rcp.yaml
@@ -1,7 +1,7 @@
 name: MGM240P OpenThread RCP
 device: MGM240PB32VNA
 base_project: src/openthread_rcp
-filename: "{manifest_name}_{ot_rcp_version.split('/')[-1]}_gsdk_{sdk_version}_{baudrate}"
+filename: "{manifest_name}_{ot_rcp_version.split('/')[-1]}_gsdk_{sdk_version}_{variant}_{baudrate}"
 sdk: "simplicity_sdk:2024.6.2"
 toolchain: "12.2.1.20221205"
 
@@ -9,6 +9,7 @@ gbl:
   fw_type: openthread_rcp
   ot_rcp_version: dynamic
   baudrate: 460800
+  variant: no_flow
 
 configuration:
 
diff --git a/manifests/sparkfun/mgm240p_zigbee_ncp.yaml b/manifests/sparkfun/mgm240p_zigbee_ncp.yaml
index 7f8194a6..5de88012 100644
--- a/manifests/sparkfun/mgm240p_zigbee_ncp.yaml
+++ b/manifests/sparkfun/mgm240p_zigbee_ncp.yaml
@@ -1,7 +1,7 @@
 name: MGM240P Zigbee
 device: MGM240PB32VNA
 base_project: src/zigbee_ncp
-filename: "{manifest_name}_{ezsp_version}_{baudrate}"
+filename: "{manifest_name}_{ezsp_version}_{variant}_{baudrate}"
 sdk: "simplicity_sdk:2024.6.2"
 toolchain: "12.2.1.20221205"
 
@@ -9,6 +9,7 @@ gbl:
   fw_type: zigbee_ncp
   ezsp_version: dynamic
   baudrate: 115200
+  variant: sw_flow
 
 configuration:
   SL_ZIGBEE_CHILD_TABLE_SIZE: 32